Improvement in sawingmmachine



acca sms @tutti @twine HIRAM THOMPSON, OF WORCESTER, MASSACHUSETTS,ASSIGNOR TO RICHARD BALL AND E. P. HALSTED, OF SAME PLACE.

Letters Patent No. 94,668, dated September 7 1,869.

The `Sehieclrlle referred to in these Letters Patent and maling part ofthe same.

Know all men by these presents.-

' That I, HmAM THOMPSON, of the city and county of Worcester, andCommonwealth of Massachusetts, have invented certain new and usefulImprovements in Resawing-Maehines; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drzwings,` forming a part of thisspecification, in which- Figure l represents a plan view of my improvedresawing-mach ine 1 Figure 2 represents a view of the right-hand side ofsame; i

Figure represents a front view;

Figure 4 represents a section on line A B, fig. 3;

Figure 5 represents a central vertical section of one of the feed-rolls;and

Figure 6 represents a section of the devices for changing the positionof the feed-rolls, takenon line C, fig. l.

To enable those skilled in the art to which my invention belongs, tomake and use the same, I will proceed to describe it more in detail.

The nature of my invention consists- First, in a peculiarly-constructedframe for supporting the feed-rolls, and the gearing by which they areoperated.

Second, in the combination .and relative arrangement of a series of'feed-rolls with each other, and their gear-shafts, substantially ashereafter explained.

Third, in the combination, with the upper ends of the feed-rolls, of aforked roll-supporting adjustable frame, provided with a scale, ashereafter explained.

Fourth, in the combination, with the frames which support the,feed-rolls, of adjusting-mechanism, as hereafter explained.

Fifth, in the combination of devices for adjusting the saw and itsarbor, as hereafter set forth.

Sixth, in the combination, with the saw, of'a peculiarly-constructedshield and dust-pipe, as hereafter described, and in the peculiardevices for supporting the arbor of the saw. A

Seventh, in a resawing-machine, the parts of which are combinedtogether, and arranged to be operated substantially as shown andhereafter described.

In the drawings- The part indicated by letter A is the main frame of themachine, which may be made of any suitable material.

Upon the forward part of the frame A, is mounted a carriage, B, whichmay be moved laterally upon said frame, ways a'being'provided for itssupport and guidance, while a screw, b, is arranged at one side, formoving and adjusting it to any desired position, where it can besecurely retained by means of the clampscrews c, that pass up throughslottedfianges formed on the inside ofthe main frame A, and screw intothe -under side of the carriage B. Y Upon' the carriage B, are arrangedsliding frameof the parts, or be taken out, when necessary to re-V movethe plates or parts of the machine connected thereto, for repairs orother purposes.

On the top of slide-plates D,.arc cast standards E,

and upon their under sides, hangers F, for supporting the bearings ofthe feed-rolls.

The bearings G, at the top of the rollsare pivoted to the curved forks Hby bolts l, that pass through the ends of the forks, with their pointsresting in depressions formed in the sides of the bearings G, which arethereby allowed to conform automatically to the inclination of the rollsC, when the latter are placed in an oblique position'.

The forks H are supportedjupon the curved flanged tops E of thestandards E, as shown inv thedrawings, and may be adjusted back andforth thereon, to give the rolls C the desired degreeof inclination, bymeans of t-he adjusting-screws g, arranged in the flanges h and i.

The forks are guided by projections 1, raised upon the tops of thestandards, which t into slots 2, formed in the forks H, as shown in fig.1 of th'e drawings.

Clamp-screws k are arranged in the projections l, by means of which theforks can vbe held securely in any position; and a scale is cut upon orcombined with one side of the forks H, which,'i n connection with theindex-points 3, fastened to the sides of the flanged -tops E', greatlyfacilitate the accurate and proper adjustment of the parts.

The rolls C are constructed as shown in fig. 5, the lower part Kof theirshafts being connected to the upper part L by a universal joint at thelower end of the roll C. v

The joint is made by forming a ball, m, on the lower end of theupperpart or roll-shaft L, and a socket inthe top of the lower part orgear-shaft'K, into'which the ball is inserted, and retained 'by a pin,a, that passes through from side to side of theshatt K, the hole in theball m, through which the pin passes, being made larger at the sidesthan at the centre, to allow ofthe required inclination.

The pin n is fitted closely in the socket It, whereby l the socketisrendered sufiiciently tightto contain the oil for lubricating thejoint.

Thev lower part K of the shaft, to which the operating-gears M areattached, is-held in an upright position in the bearings N, fixed te thehangers F, said bearings being made to accommodate the jour- `nais of apair of rolls, each, as well as the journal of the intermediate gear O,from which the gears M and feed-rolls G derive their motion, which istransmitted through them from the shaft P, they being connected theretoby the bevelled gears Q andR', one gear, Q, beingfsec'ulalto theintermediate gear O, and the other gear, R, to the shaft P.

The hubs of gears R are recessed, to receive the bearings S, formed bythe prolongation of the hangers F, for the-"purpose of sliding tl zegears along the shaft P, to keep them in the correct relative position,as regardsl gears Q, when the `feeding-rolls are moved to and lroinVeach other.

Grooves 0 are formed in the shaft P, to which the gears are secured bymeans of splines or screws.

The device for moving the feed-rolls to and from each other consists ofa horizontal shaft, T, which extends from the front of the machinebackward, be-

y neath the ri ght-han d lslide-plate D, nearly to its centre,

as shown in dottedlines,.tig'. '1. v

Y It is supported by bearings U, attached to the un- "by which thelatter is held in gear and guided.

A gear, q, is fixed to the front end of shaft T, which is operatedon bya dog, s, pivot-ed in the fork of the balance-leverY, which lever isfulcrumed on the shaft T at each side ofthe gear q, and extends acrossat the front side of the machine, as fully indicated in the drawings.

A weight, Z, is suspended from the lever Y, which l gives the requiredpressure on the feed-rolls C.

Dog s is so formed that its weight causes it to engage' the cogs of thegear q with its lower arm, which operation tends to press the feed-rollstoward each other; but by raising the rear part thereof, it may be madeto engage the cogs with its upper arm, which will move the rolls apart.

' Anf arm, t, projects from the frame A, at the left side of themachine, upon which the end Vof lever Y rests, to prevent it fromfalling too low.l

When' it is desirous to operate but a single pair of the feed-rolls, astop-piece, A,secured to carriage B at it its right-'hand rearcorner,'may be swung forward, and the set-'screw c screwed against theedge of the right-hand slide-plate D, which is thereby prevented frommoving any further outward. Then, by removing the screw 4, the-rackW isallowed to move along the groove in said plate without operating'it,while at vthe same time the opposite pair is movedas usual.

Thesaw-table B' extends the length of the machine,

and is screwed or boltedto the front and rear transoms ofthe main frameA. One of its sides is arranged to' swing up, to facilitate the removalof the saw.

The movable `side is pivoted at its rear end by the Ascrew or bolt 5,and secured at its front end by the bolt or screw 6, as shown in fig.'4.

,The arbor G ofthe saw D is supported` andtnrns in bearings O1 and O,united by a curved frame-piece, P. l

Said bearings can be adjusted forward or back, as desired, theybeingsupported on ways F', one of which is on the main frame A, and theother'on Ythe lo'ngitndinalr'central frame G', the lattervbeing fittedinto a groove formed inthe bottom of the arbor-bearing. O'Z, while theformer rests on a planed surface under the bearing O1.

It will be seen that by the above described construction of the parts,that when the rear end of the central frame G' is swung either v. to theright or left, to adjust the saw on a line with the feed-rolls, that thegrooved bearing O2 will. be retained in its relative position asrespects the frame G', while the bearing O1 will slidel laterally uponthe way F', thus rendering the -adjustment ofthe sawvery easy andperfect, while the parts are not liable to derangement.

Slots 11 are formed in 'the frames parallel to the ways F, in which arearranged clamping-bolts 12, for sccuri-ngthe arbor-bearings Ol and O2 inthe desired positions.

The saw-arbor is operated by a belt-from vthe drivin gshaft, suitablepulleys being arranged for that purpose.

The shaft P, which'operates the feedingdevices, is driven'from thesaw-arbor by belts H and K', running from opposite ends of the shaft I',as fully indicated in the drawings. '1

The longitudinal central frame G' has'an adjustingthe saw can beadjusted feedrolls. l The vlower half of the saw is enclosed in a case,M', for carrying oii the saw-dust, which is 'driven .out through thetube N by the j current of air raised by the' saw.

The case M is formed in two parts, said parts being part.

By this method of construction, thel case may be readily taken apart, toiin'ilitate'the removal of the saw'D. from its arbor C', it being onlynecessary to take out the bolt 6, and raise or swing up the movablewhen, by removing' the nut 10, the saw D is freed from the machinewithout disturbing any other parts. Thus it will be seen that'the sawmay be changed for another of' different size, with but little troublein comparison to other methods.

By the use of two pairs of feed-rolls, the boards are passed through themachine in a much more even and regular manner than with a single pairot rolls, asgthe rolls engage the end of oneA board before releasing theone in advance, thereby obviating the necessity of crowding the boardsbetween the rolls.

Again, by the use of my weighting-device, an equal pressure is preservedon each pair of rolls when both are in gear, so that the boards aresawed accurately in thec entre,'while if but one pair is ingear, thesame amount of pressure is retained, without any alteration oftheweights.

cess of manufacture is greatly facilitated, and at the same time a muchmore substantial machine is' produced than` would be the case were theseparts cast there'isgreat:liabilityV ofthe parts becoming loose anddisplaced, or out .ofadj ustment. But with my method a rm and stiffframe produced.

It will be observed that, by the use of the laterally- By thisarrangement, the machine can be easily adscrew, 7, arranged at its rearend, by means of which.

in perfect alignment with the held together by the hooks 8, castA uponone of the. parts, which hocken to flanges 9, cast lupon the other sideof the table, and lift otE the sideot' the-case M', p

It will be seen that by casting the slide-plates D, Astandards E, andhangers Fin a single piece, theproseparately and bolted together, forwhen so constructed,

of construction, suoli displacement is impossible, and

adjustable carriage B, the whole ofthe feeding-mechanjusted to saw moreor less from one side-of the stick f of'tirnber without changing ordisturbing the position ofthe saw, or without even stopping it.

,This is a great advantage, as will readily be seen by those-skilled inthe art to which my invention belongs.

Having described my improved resawing-machine,

What I claim as new, and of my invention, and desire to secure byLetters'latent, is

1. The combination, with the feed-rolls O C C G and roll-shafts L, ofthe gear-shafts K and pins y, passing through both -said shafts,substantially as shown inthe drawings, and herein described.

2. The combination, with the upper ends of the feed-rolls C C, oftheroll-supporting adjustable frame H, forked so asto holdeach pair ofrolls, substantially as and for the purposes set forth.

3. The combination of the slotted forked frame H.

withtheanged standard E, provided with the pro- `lection 1,substantially vas land for the purposes set orth.

4. The combination, with the adjustable roll-supporting frame H, of ascale and index, substantially as`and for the purposes set fortln 5. Thecombination, with the slotted forked frame lH and anged standard E, ofthe adjusting-screw g,

substantially as shown and described.

6. The combination, with the sliding frame-plates D D, of the rack-barsW X, cog-wheel V, and shaft T,'the parts being constructed and arrangedin rela# tion to each other, substantially as shownV aud described. g

7. The combination, with the rack 1V and slideplate D, of the screw 4,ysubstantially as and for the purposes set forth. l8. The combination,with the adjustable carriage B, of the sliding' frame-plates D D,connected with and held upon vsaid carriage, substantially'as shown anddescribed.

9. rlhe combination, with the adjustable carriage B, of theclamping-screws c c and adjusting-screw b, substantially as and for thepurposes set forth.

10. VThe combination, with the sliding frame-plate D, Aof a swingingstop-device, A fr, as shown and described.

11. 'lhe combinatiomwith the saw D', ofthe divided shield M' anddust-pipe N', when constructed substantially as and Vfor the purposesset forth.

12. The combination, with the main frame A and laterally-moving frameG', pivoted and adjusted as described, of the gifooved bearing Oi,bearing $1, and elevated ways F', said hearings being capable o a1ong'itudinal adj ustment, as shown and described.

13. A machineA for resawing lumber, the parts of, which are constructed,arranged, and combined together, substantially as show'n and described.

Witnesses: HIRAM THOMPSON.

THos. H. DODGE, ALBERT E. PEIRCE.

